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Date:         Fri, 3 Jun 2011 16:22:12 -0700
Reply-To:     David Marso <david.marso@gmail.com>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         David Marso <david.marso@gmail.com>
Subject:      Re: Python: List Index out of range
In-Reply-To:  <1307134271637-4452509.post@n5.nabble.com>
Content-Type: text/plain; charset=UTF-8

drfg2008 wrote: > > I’ve found the solution at last: if len(alpha) ==1 instead of 0. > > if len(alpha) ==1 and len(beta1) == 1 and len(beta2) ==1: > … > else: > continue > > > Thanks for the hint of the “out of range” problem. I would never have > happened on it. > > >>@David: The task was to generate (calibrate) a regression model in file1 and use it in file2. > TRIVIAL! See SELECT subcommand with SAVE PRED(varname)within REGRESSION > (assumes your files are stacked using ADD FILES with an identifier). This > also respects SPLIT FILE -cases which match the SELECT clause are used to > estimate the model. If /SAVE is specified the unselected cases can have > predicted values estimated using the equation calibrated in the SELECT. > > Actually regressions over 351 splits in each file multiplied by 3 > different times (t0, t1, t2) multiplied by 2 different regression models > (3 variables and 4 variables). I suggested a different approach > (multilevel regression) and reducing the split-groups, but the customer > insisted of computing about 2100 regressions (because this was the method > described in the literature). So, what can I do? > > Frank, > It looks like you are getting lost in the forest due to unfamiliarity > with a few important trees. > Notably the following and how the operate together. > ADD FILES > SORT CASES > SPLIT FILE > SELECT/SAVE subcommands within REGRESSION and consider how they work > together. > after that do something like the following. > Study the outcome.... > THEN AND *ONLY* THEN bring Python or MACRO into the scene. > Allow SPSS to handle as much of the messy repetitive stuff and use Python > like a pair of tweezers pulling a splinter from a pinkie finger rather > than as a hammer where everything is a nail ;-) > Consider the following: > Consider wrapping the basic meat in a python loop but let SPSS take care > of all the crossvalidation and iterative (SPLIT) stuff. You will have > more hair next week . > GET > FILE='C:\Program Files\SPSS\1991 U.S. General Social Survey.sav' > /KEEP EDUC HAPPY LIFE SIBS AGE RACE. > SORT CASES BY EDUC RACE. > SPLIT FILE BY EDUC. > MISSING VALUES ALL (). > > REGRESSION VARIABLES happy life sibs age > /SELECT RACE EQ 1 > /DEP happy > /METHOD ENTER life sibs age > /SAVE PRED(RACE1). > > REGRESSION VARIABLES happy life sibs age > /SELECT RACE EQ 2 > /DEP happy > /METHOD ENTER life sibs age > /SAVE PRED(RACE2). > > REGRESSION VARIABLES happy life sibs age > /SELECT RACE EQ 3 > /DEP happy > /METHOD ENTER life sibs age > /SAVE PRED(RACE3). > > > > Frank >

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